Structured light emitting device and image acquisiton device uisng same

Abstract

A structured light emitting device includes a light emitting element configured to emit source light, a light modulator configured to modulate the source light into structured light and emit the structured light, and a lens. The lens is configured to transmit structured light. A lens controlling component is provided to drive the lens to synchronously move according to current motion information of the structured light emitting device. A controller is electrically coupled both the light emitting element and the light modulator. The controller is configured to control the light emitting element to emit the source light and control the light modulator to modulate the source light.

What is claimed is: 
     
         1 . A structured light emitting device configured to emit structured light, comprising:
 a light emitting element configured to emit source light;   a light modulator positioned on an optical path of the source light, the light modulator configured to modulate the source light into structured light and emit the structured light;   a lens transmitting the structured light;   a lens controlling component, the lens controlling component configured to drive the lens to synchronously move according to a current motion information of the structured light emitting device and the structured light is emitted to a predetermined position of an object; and   a controller electrically coupled to each of the light emitting element and the light modulator, the controller being configured to control the light emitting element to emit the source light and control the light modulator to modulate the source light.   
     
     
         2 . The structured light emitting device of  claim 1 , wherein the lens controlling component comprises:
 a motion detection unit electrically coupled to the controller and configured to detect and obtain the current motion information of the structured light emitting device; and   a driving unit electrically coupled to the controller, the controller configured to output a controlling signal to the driving unit according to the current motion information of the structured light emitting device, the driving unit configured to drive the lens to generate a synchronous movement with movement of the structured light emitting device.   
     
     
         3 . The structured light emitting device of  claim 2 , wherein the current motion information of the structured light emitting device comprises a moving direction and a moving distance of the structured light emitting device. 
     
     
         4 . The structured light emitting device of  claim 2 , wherein the motion detection unit is a gyroscope. 
     
     
         5 . The structured light emitting device of  claim 2 , wherein the driving unit is a voice coil motor. 
     
     
         6 . The structured light emitting device of  claim 5 , wherein the driving unit surrounds the lens. 
     
     
         7 . The structured light emitting device of  claim 1 , wherein the light modulator light modulator is a digital micromirror device and comprises a plurality of micro-mirrors spaced apart from each other and arranged in an array; each of the plurality of micro-mirrors is configured for selectively projecting light into the lens. 
     
     
         8 . The structured light emitting device of  claim 7 , further comprising a light-absorbing element, wherein the light-absorbing element is configured to absorb light reflected by at least one of the plurality of micro-mirrors. 
     
     
         9 . The structured light emitting device of  claim 1 , wherein the light emitting element is an infrared laser emitting diode chip or an infrared light emitting diode chip. 
     
     
         10 . An image acquisition device, comprising:
 a structured light emitting device configured to emit structured light to an object, the structured light emitting device comprising:   a light emitting element configured to emit source light;   a light modulator positioned on an optical path of the source light, the light modulator configured to modulate the source light into structured light and emit the structured light;   a lens transmitting the structured light; and   a lens controlling component, the lens controlling component configured to drive the lens to synchronously move according to a current motion information of the structured light emitting device and the structured light is emitted to a predetermined position of an object; and   a controller electrically coupled both the light emitting element and the light modulator, the controller configured to control the light emitting element to emit the source light and control the light modulator to modulate the source light;   an optical sensor configured to receive the structured light reflected by the object and generate a structured-light image; and   an image processor electrically connected to the optical sensor and configured to receive the structured-light image and calculate position information and depth information of the object.   
     
     
         11 . The image acquisition device of  claim 10 , wherein the lens controlling component comprises:
 a motion detection unit electrically coupled to the controller and configured to detect and obtain the current motion information of the structured light emitting device; and   a driving unit electrically coupled to the controller, the controller configured to output a controlling signal to the driving unit according to the current motion information of the structured light emitting device, the driving unit configured to drive the lens to generate a synchronous movement with movement of the structured light emitting device.   
     
     
         12 . The image acquisition device of  claim 11 , wherein the current motion information of the structured light emitting device comprises a moving direction and a moving distance of the structured light emitting device. 
     
     
         13 . The image acquisition device of  claim 11 , wherein the motion detection unit is a gyroscope. 
     
     
         14 . The image acquisition device of  claim 11 , wherein the driving unit is a voice coil motor. 
     
     
         15 . The image acquisition device of  claim 14 , wherein the driving unit surrounds the lens. 
     
     
         16 . The image acquisition device of  claim 10 , wherein the light modulator light modulator is a digital micromirror device and comprises a plurality of micro-mirrors spaced apart from each other and arranged in an array; each of the plurality of micro-mirrors is configured for selectively projecting light into the lens. 
     
     
         17 . The image acquisition device of  claim 16 , further comprising a light-absorbing element, wherein the light-absorbing element is configured to absorb light reflected by at least one of the plurality of micro-mirrors. 
     
     
         18 . The image acquisition device of  claim 10 , wherein the light emitting element is an infrared laser emitting diode chip or an infrared light emitting diode chip.